Last Thursday, a Twitter user named @mariancall asked her followers, “What were your first seven jobs?” She was soon inundated with mentions, as several celebrities, from Buzz Aldrin to Stephen Colbert, shared their first gigs. Aldrin, one of the first two men to set foot on the moon, started as a dishwasher. Colbert, who’s hosted two eponymous talk shows, was once a busboy and even a futon salesman. Many business executives and entrepreneurs also tweeted their career trajectories.